You can't find an i5 system for that budget in the US, let alone india. Stick to an i3 6100, gigabyte b150 d3, 16gb ram, $30 case, seasonic s12ii or similar at ~430-520W, and a 750ti (total of ~$475, probably a bit over your budget after adjusting for ridiculous prices over there) unless you go the used parts route.